I owned an AB-3 several years back. Beautiful instruments, well built as you would expect. Big instrument -- Best (and most accurate) description I've ever heard: "It's like hanging a Buick around your neck." Acoustically, the AB series is surprisingly quiet for its size. Pickup system is good, though.
For the Taylor collection, it's a neat find. As a working addition to the performance arsenal, I found it very limited. As always, YMMV...